Silicone functionalized fluids with low traction characteristics
AssigneeExxonMobil Chemical Patents Inc.
InventorsWenning Wang Han, Martin N. Webster, Bernie J. Pafford
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Abstract
A highly branched functionalized silicone backbone lubricating fluid which provides exceptionally low traction, a method of lowering traction coefficients in lubricating compositions, and to uses of such compositions.
Claims22
A low traction lubricating composition having a traction coefficient of less than or equal to 0.02 as measured using a Mini Traction Machine, said composition comprising a highly branched functionalized silicone backbone composition, wherein said highly branched functionalized silicone backbone composition is a silicone composition having the formula:
- wherein:
- R1 are independently selected from the group consisting of:
- an alkyl having 1-5 carbon atoms, a substituted alkyl having 1-5 carbon atoms optionally substituted by one or more fluorine atoms, and a phenyl, and R2 is selected from the group consisting of:
- hydrogen, alkyl of 1 to 45 carbon atoms, substituted alkyl of 1 to 45 carbon atoms optionally substituted by one or more fluorine atoms, aryl, a partially esterified ester-containing group represented by the formula:
- and a reverse ester thereof represented by the formula:
- and the formula:
- and a reverse ester thereof represented by the formula:
- provided that if R1 is anything but methyl or ethyl, then R2 must be a methyl, ethyl or butyl,
- R3 is derived from a partially esterified ester residue;
- R8 is selected from the group consisting of:
- hydrogen, alkyl of 1 to 45 carbon atoms, substituted alkyl of 1 to 45 carbon atoms optionally substituted by one or more fluorine atoms, aryl and a compound derived from a partially esterified ester residue;
- R9 is selected from the group consisting of:
- an arylene, an alkylene of 1 to 22 carbon atoms, substituted alkylene of 1 to 22 carbon atoms optionally substituted by one or more fluorine atoms and arylene;
- R4 is selected from the group consisting of:
- alkyl of 1 to 45 carbon atoms, substituted alkyl of 1 to 45 carbon atoms optionally substituted by one or more fluorine atoms, aryl, said ester-containing group and said compound derived from reverse esters thereof;
- m is an integer between about 5 to about 22;
- and
- x is an integer between about 0 to about 1000;
- wherein said composition has at least 1 compound derived from said partially esterified ester-containing group or said reverse ester thereof.
A low traction lubricating composition having a traction coefficient of less than or equal to 0.02 as measured using a Mini Traction Machine, said composition comprising a highly branched functionalized silicone backbone composition, wherein said highly branched functionalized silicone backbone composition is a silicone composition having the formula:
- wherein R4 is selected from the group consisting of:
- alkyl and a group represented by the formula:
- wherein:
- a is an integer in the range between about 1 to about 20;
- b is an integer in the range between about 0 to about 1000;
- R3 is a compound derived from a partially esterified ester residue;
- and
- m is an integer in the range between about 5 to about 22;
- with the proviso that the R4 groups are not all alkyls.
Dependencies are inferred from the claim text.